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Casio Pro Trek Smart WSD-F30 smartwatch has a smaller case, better power management, and improved dual-layer display
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Amazon.com: Casio Men's PRO Trek Stainless Steel Quartz Watch with Resin Strap, Green, 25.2 (Model: WSD-F20A-GNBAU) : Clothing, Shoes & Jewelry
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Casio unveils Pro Trek WSD-F30, a rugged smartwatch that lasts up to 30 days on a charge | VentureBeat
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Amazon.com: IPG for Casio Pro Trek Smart WSD - F30 Outdoor Watch Screen Protector (2 Units) Invisible Ultra HD Clear Film Anti Scratch Skin Guard - Smooth/Self-Healing/Bubble -Free by IPG : Cell
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